Search Results for author: Aimin Zhou

Found 39 papers, 20 papers with code

Echo: A Large Language Model with Temporal Episodic Memory

no code implementations22 Feb 2025 Wentao Liu, Ruohua Zhang, Aimin Zhou, Feng Gao, Jiali Liu

Research on large language models (LLMs) has shown remarkable performance in domains such as mathematics, programming, and literary creation.

Language Modeling Language Modelling +2

Un-evaluated Solutions May Be Valuable in Expensive Optimization

no code implementations5 Dec 2024 Hao Hao, Xiaoqun Zhang, Aimin Zhou

Compared to mainstream SAEAs and Bayesian optimization algorithms, our approach incorporating the un-evaluated solution strategy shows a marked improvement.

Bayesian Optimization Evolutionary Algorithms

LLMOPT: Learning to Define and Solve General Optimization Problems from Scratch

1 code implementation17 Oct 2024 Caigao Jiang, Xiang Shu, Hong Qian, Xingyu Lu, Jun Zhou, Aimin Zhou, Yang Yu

Namely, the accuracy of most current LLM-based methods and the generality of optimization problem types that they can model are still limited.

Code Generation Combinatorial Optimization

Investigating and Mitigating Object Hallucinations in Pretrained Vision-Language (CLIP) Models

1 code implementation4 Oct 2024 Yufang Liu, Tao Ji, Changzhi Sun, Yuanbin Wu, Aimin Zhou

Large Vision-Language Models (LVLMs) have achieved impressive performance, yet research has pointed out a serious issue with object hallucinations within these models.

counterfactual Data Augmentation +3

Cause-Aware Empathetic Response Generation via Chain-of-Thought Fine-Tuning

no code implementations21 Aug 2024 Xinhao Chen, Chong Yang, Man Lan, Li Cai, Yang Chen, Tu Hu, Xinlin Zhuang, Aimin Zhou

Empathetic response generation endows agents with the capability to comprehend dialogue contexts and react to expressed emotions.

Diversity Empathetic Response Generation +1

It's Morphing Time: Unleashing the Potential of Multiple LLMs via Multi-objective Optimization

no code implementations29 Jun 2024 Bingdong Li, Zixiang Di, Yanting Yang, Hong Qian, Peng Yang, Hao Hao, Ke Tang, Aimin Zhou

To address these challenges, we formalize model merging as a multi-objective optimization problem and propose an automated optimization approach named MM-MO.

Bayesian Optimization Language Modelling +1

ORCDF: An Oversmoothing-Resistant Cognitive Diagnosis Framework for Student Learning in Online Education Systems

no code implementations28 Jun 2024 Hong Qian, Shuo Liu, Mingjia Li, Bingdong Li, Zhi Liu, Aimin Zhou

This paper contends that the oversmoothing issue arises from that existing CDMs seldom utilize response signals on exercises in the learning part but only use them as labels in the assessing part.

cognitive diagnosis

Large Language Models as Surrogate Models in Evolutionary Algorithms: A Preliminary Study

1 code implementation15 Jun 2024 Hao Hao, Xiaoqun Zhang, Aimin Zhou

Specifically, we formulate model-assisted selection as a classification and regression problem, utilizing LLMs to directly evaluate the quality of new solutions based on historical data.

Evolutionary Algorithms

A First Look at Kolmogorov-Arnold Networks in Surrogate-assisted Evolutionary Algorithms

1 code implementation26 May 2024 Hao Hao, Xiaoqun Zhang, Bingdong Li, Aimin Zhou

We employ KANs for regression and classification tasks, focusing on the selection of promising solutions during the search process, which consequently reduces the number of expensive function evaluations.

Evolutionary Algorithms Kolmogorov-Arnold Networks

DOP: Diagnostic-Oriented Prompting for Large Language Models in Mathematical Correction

no code implementations20 May 2024 Hao Chen, Biaojie Zeng, Xin Lin, Liang He, Aimin Zhou

Math world problems correction(MWPC) is a novel task dedicated to rectifying reasoning errors in the process of solving mathematical problems.

Diagnostic Math +1

Expensive Multi-Objective Bayesian Optimization Based on Diffusion Models

no code implementations14 May 2024 Bingdong Li, Zixiang Di, Yongfan Lu, Hong Qian, Feng Wang, Peng Yang, Ke Tang, Aimin Zhou

In this paper, we propose a novel Composite Diffusion Model based Pareto Set Learning algorithm, namely CDM-PSL, for expensive MOBO.

Bayesian Optimization

Inductive Cognitive Diagnosis for Fast Student Learning in Web-Based Online Intelligent Education Systems

1 code implementation17 Apr 2024 Shuo Liu, Junhao Shen, Hong Qian, Aimin Zhou

To this end, this paper proposes an inductive cognitive diagnosis model (ICDM) for fast new students' mastery levels inference in WOIESs.

cognitive diagnosis

Model Uncertainty in Evolutionary Optimization and Bayesian Optimization: A Comparative Analysis

2 code implementations21 Mar 2024 Hao Hao, Xiaoqun Zhang, Aimin Zhou

Black-box optimization problems, which are common in many real-world applications, require optimization through input-output interactions without access to internal workings.

Bayesian Optimization

Enhancing Depression-Diagnosis-Oriented Chat with Psychological State Tracking

no code implementations12 Mar 2024 Yiyang Gu, Yougen Zhou, Qin Chen, Ningning Zhou, Jie zhou, Aimin Zhou, Liang He

Depression-diagnosis-oriented chat aims to guide patients in self-expression to collect key symptoms for depression detection.

Depression Detection Language Modeling +3

Wasserstein Differential Privacy

1 code implementation23 Jan 2024 Chengyi Yang, Jiayin Qi, Aimin Zhou

We propose Wasserstein differential privacy (WDP), an alternative DP framework to measure the risk of privacy leakage, which satisfies the properties of symmetry and triangle inequality.

Privacy Preserving

Symbolic Cognitive Diagnosis via Hybrid Optimization for Intelligent Education Systems

1 code implementation30 Dec 2023 Junhao Shen, Hong Qian, Wei zhang, Aimin Zhou

The SCD framework incorporates the symbolic tree to explicably represent the complicated student-exercise interaction function, and utilizes gradient-based optimization methods to effectively learn the student and exercise parameters.

Attribute cognitive diagnosis

Mathematical Language Models: A Survey

no code implementations12 Dec 2023 Wentao Liu, Hanglei Hu, Jie zhou, Yuyang Ding, Junsong Li, Jiayi Zeng, Mengliang He, Qin Chen, Bo Jiang, Aimin Zhou, Liang He

In recent years, there has been remarkable progress in leveraging Language Models (LMs), encompassing Pre-trained Language Models (PLMs) and Large-scale Language Models (LLMs), within the domain of mathematics.

Survey

Interpretable Knowledge Tracing via Response Influence-based Counterfactual Reasoning

1 code implementation1 Dec 2023 Jiajun Cui, Minghe Yu, Bo Jiang, Aimin Zhou, Jianyong Wang, Wei zhang

Knowledge tracing (KT) plays a crucial role in computer-aided education and intelligent tutoring systems, aiming to assess students' knowledge proficiency by predicting their future performance on new questions based on their past response records.

counterfactual Counterfactual Reasoning +1

Unlearning with Fisher Masking

no code implementations9 Oct 2023 Yufang Liu, Changzhi Sun, Yuanbin Wu, Aimin Zhou

Experiments on various datasets and network structures show the effectiveness of the method: without any fine-tuning, the proposed Fisher masking could unlearn almost completely while maintaining most of the performance on the remain data.

Machine Unlearning

Evolutionary Retrosynthetic Route Planning

1 code implementation8 Oct 2023 Yan Zhang, Hao Hao, Xiao He, Shuanhu Gao, Aimin Zhou

The experimental results show that, in comparison to the Monte Carlo tree search algorithm, EA significantly reduces the number of calling single-step model by an average of 53. 9%.

Multi-step retrosynthesis Retrosynthesis

Enhancing SAEAs with Unevaluated Solutions: A Case Study of Relation Model for Expensive Optimization

1 code implementation21 Sep 2023 Hao Hao, Xiaoqun Zhang, Aimin Zhou

Furthermore, the surrogate-selected unevaluated solutions with high potential have been shown to significantly enhance the efficiency of the algorithm.

Evolutionary Algorithms Relation

EduChat: A Large-Scale Language Model-based Chatbot System for Intelligent Education

2 code implementations5 Aug 2023 Yuhao Dan, Zhikai Lei, Yiyang Gu, Yong Li, Jianghao Yin, Jiaju Lin, Linhao Ye, Zhiyan Tie, Yougen Zhou, Yilei Wang, Aimin Zhou, Ze Zhou, Qin Chen, Jie zhou, Liang He, Xipeng Qiu

Currently, EduChat is available online as an open-source project, with its code, data, and model parameters available on platforms (e. g., GitHub https://github. com/icalk-nlp/EduChat, Hugging Face https://huggingface. co/ecnu-icalk ).

Chatbot Language Modeling +2

Scaling Multi-Objective Security Games Provably via Space Discretization Based Evolutionary Search

1 code implementation28 Mar 2023 Yu-Peng Wu, Hong Qian, Rong-Jun Qin, Yi Chen, Aimin Zhou

Then, a many-objective EA is used for optimization in the low-dimensional discrete solution space to obtain a well-spaced Pareto front.

Evolutionary Algorithms

An Evolutionary Forest for Regression

1 code implementation IEEE Transactions on Evolutionary Computation 2021 Hengzhe Zhang, Aimin Zhou, Hu Zhang

Random forest (RF) is a type of ensemble-based machine learning method that has been applied to a variety of machine learning tasks in recent years.

Penn Machine Learning Benchmark regression

A cross-modal fusion network based on self-attention and residual structure for multimodal emotion recognition

1 code implementation3 Nov 2021 Ziwang Fu, Feng Liu, HanYang Wang, Jiayin Qi, Xiangling Fu, Aimin Zhou, Zhibin Li

Firstly, we perform representation learning for audio and video modalities to obtain the semantic features of the two modalities by efficient ResNeXt and 1D CNN, respectively.

Multimodal Emotion Recognition Representation Learning

EvoGAN: An Evolutionary Computation Assisted GAN

1 code implementation22 Oct 2021 Feng Liu, HanYang Wang, Jiahao Zhang, Ziwang Fu, Aimin Zhou, Jiayin Qi, Zhibin Li

Quantitative and Qualitative results are presented on several compound expressions, and the experimental results demonstrate the feasibility and the potential of EvoGAN.

Image Generation

Ensemble Defense with Data Diversity: Weak Correlation Implies Strong Robustness

no code implementations5 Jun 2021 Renjue Li, Hanwei Zhang, Pengfei Yang, Cheng-Chao Huang, Aimin Zhou, Bai Xue, Lijun Zhang

In this paper, we propose a framework of filter-based ensemble of deep neuralnetworks (DNNs) to defend against adversarial attacks.

Diversity

Variable Division and Optimization for Constrained Multiobjective Portfolio Problems

no code implementations21 Jan 2021 Yi Chen, Aimin Zhou

For example, a variable of portfolio problem can be divided into two partial variables, i. e. the selection of assets and the allocation of capital.

Evolutionary Algorithms

Survey of the Detection and Classification of Pulmonary Lesions via CT and X-Ray

no code implementations31 Dec 2020 Yixuan Sun, Chengyao Li, Qian Zhang, Aimin Zhou, Guixu Zhang

In recent years, the prevalence of several pulmonary diseases, especially the coronavirus disease 2019 (COVID-19) pandemic, has attracted worldwide attention.

General Classification

Boundary Guidance Hierarchical Network for Real-Time Tongue Segmentation

no code implementations14 Mar 2020 Xinyi Zeng, Qian Zhang, Jia Chen, Guixu Zhang, Aimin Zhou, Yiqin Wang

Finally, the proposed hybrid loss in a four hierarchy-pixel, patch, map and boundary guides the network to effectively segment the tongue regions and accurate tongue boundaries.

Image Segmentation Semantic Segmentation

Preselection via Classification: A Case Study on Evolutionary Multiobjective Optimization

no code implementations3 Aug 2017 Jinyuan Zhang, Aimin Zhou, Ke Tang, Guixu Zhang

Finally it uses the classifier to filter the unpromising candidate offspring solutions and choose a promising one from the generated candidate offspring set for each parent solution.

Classification Evolutionary Algorithms +2

Learning from Non-Stationary Stream Data in Multiobjective Evolutionary Algorithm

no code implementations16 Jun 2016 Jianyong Sun, Hu Zhang, Aimin Zhou, Qingfu Zhang

Evolutionary algorithms (EAs) have been well acknowledged as a promising paradigm for solving optimisation problems with multiple conflicting objectives in the sense that they are able to locate a set of diverse approximations of Pareto optimal solutions in a single run.

Clustering Evolutionary Algorithms

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